Ninety-year-old Carl Grove told the U.S. Anti-Doping Agency his failed drug test was the result of a piece of contaminated meat he ate the night before his race.

The agency listened, then gave Grove a public warning and stripped him of the world record he set in July at the Masters Track National Championships.

The nonagenarian from Bristol, Ind., "accepted a public warning for his anti-doping rule violations," on Friday, the USADA said in a statement about Grove's punishment.

After setting the world record on July 11, Grove provided an in-competition urine sample. The results were positive for epitrenbolone, a metabolite of the prohibited substance trenbolone, according to the USADA.

Results from USA Cycling in July said Grove was the oldest competitor at the event —the individual pursuit, which is 2 kilometers or 1.24 miles — and he finished with a time of 3:06.129 in his 90-94 age division. For comparison, Rob Lea, who won the men’s 75-79 age group, had a time of 2:58.947

"Since his positive sample was collected in-competition, Grove has been disqualified from competitive results obtained on July 11, 2018, the date his sample was collected," the agency said. That means his world title in the sprint competition is null and void.

Grove couldn't immediately be reached for comment.

During USADA’s investigation, Grove provided the agency with information that established the source of his positive test was more likely than not caused by contaminated meat he'd eaten for dinner July 10. Grove had tested negative for prohibited substances during an in-competition test earlier that day — before he ate the meat.

However, while investigating the source of Grove's positive test, the agency determined that a supplement Grove was using before July 11 was contaminated with clomiphene, another prohibited substance.

Before telling the agency about the meat he'd eaten on the evening prior to the Masters, Grove gave USADA a list of supplements he had used, none of which listed clomiphene or any other prohibited substances on the Supplement Facts label, the USADA said.

This isn't the first time meat has been blamed for a failed drug test. Alberto Contador was given a two-year ban and stripped of the 2010 Tour de France title after the performance enhancing drug clenbuterol was found in his blood. Contador too blamed the positive result on bad meat.